.topSer {
    background-color: white;
}

.topSer a {
    color: #254375;
}

.allBack {
    width: 100%;
    background-image: url(https://zhang0228.oss-cn-wulanchabu.aliyuncs.com/beijing.jpg);
    background-repeat: no-repeat;
    background-size: 100% 5757px;
}

.main {
    position: relative;
    width: 3840px;
    height: 2455px;
    margin: auto;
}

.biaoqian {
    position: absolute;
    top: 75px;
    left: 160px;
    font-size: 40px;
}

.allBox {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 2385px;
    height: 1600px;
}

.shang {
    position: relative;
    width: 2385px;
    height: 1248px;
    background-color: rgba(0, 0, 0, 0.1);
}

.shimg {
    position: absolute;
    left: 88px;
    top: 150px;
    width: 565px;
    height: 820px;
    background-color: #d9d9d9;
    line-height: 820px;
    text-align: center;
    font-size: 80px;
}

.bookmess {
    position: absolute;
    top: 150px;
    left: 770px;
    display: flex;
    flex-direction: column;
    width: 1500px;
    height: 920px;
    font-size: 80px;
}

.bookmess div {

    flex: 1;
}

.btnsure,
.btncsl {
    position: absolute;
    bottom: 0;
    width: 430px;
    height: 180px;
    background-color: #ccd3dd;
    border-radius: 50px;
    line-height: 180px;
    text-align: center;
    font-size: 80px;
}

.btnsure {
    right: 500px;
}

.btncsl {
    right: 0;
}